Officials are probing how a 51-year-old highway bridge came to collapse in the Italian port city of Genoa yesterday, killing at least 26 people and injuring 16 others as it sent dozens of vehicles tumbling into a heap of concrete and twisted steel.

‘Give back Boxing Day’: Retailers rally against NSW Government

Retail workers have taken to Sydney’s streets to rally against proposed laws to extend Boxing Day trading across New South Wales.

Dozens of people dressed in Santa Clause costumes gathered in Sydney’s Martin Place to decorate a Christmas tree with special messages as to why the day was important to them.

One protester wrote: “It gives me the opportunity to spend time with family”.

(9NEWS) ()

Until last Christmas, only shops in the city’s CBD were allowed to trade on Boxing Day under the Retail Trading Act NSW.

However, following a two-year trial deregulation of legislation by the state government, all shops are allowed to open their doors if they choose.

The NSW Retailers Association however, wants the changes to be made permanent, saying the deregulation levels the playing field for smaller retailers in the suburbs and brings New South Wales into line with Victoria and other deregulated states.

Many protesters said the day was important for them so they could spend time with their families. (9NEWS) ()